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Melika
@melikafrj
Tunnel building,TBM segment
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maryam🎩👍🔵🎭
@hasanrastegar
Tunnels are used to connect two different points underground, from the simplest tunnels to very complex and large tunnels. One of the effective methods for tunnel digging is the use of tunnel boring machines (TBM).
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Melika
@melikafrj
Thanks for sharing your opinion
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